6 Causes of Knee Pain When Running

Causes of knee pain when running can range from patellofemoral pain syndrome (PFPS), or "runner's knee," to poor form while running. Patellar tendinitis, or "jumper's knee," is another condition that may cause pain under or below your kneecap. Wearing the wrong shoe for your foot shape and stride can also cause knee pain or sore knees after running.